Improvement in door-latches



T. PERGIVAL. Door-Latch.

No. 198,811. Patented 1an; 1,1878.

r l ,1 d( a ATTORNEYS.

NJERS, PHOYO-LITNOGRAFHER, WASrHNGTGN. D C

UNITED mins"PATENTOFFIGE- rHOMAs rnncrvnn, on NAPANOGK, NEW YORK.

IMPROVEMENT IN DOOR-LATCHES.

Specification forming part of Letters Patent No. 198,811, dated January 1,1878; application iiled September 22, 1-877. f

To all whom it may concern:

Be it known that I, TnoMAs PERcIvAL, of Napanock, county of Ulster and State of New York, have invented a new and Improved Door-Latch, of which the following is a speci- Iication:

Figure l is a side elevation of my improved door-latch. Fig. 2 is a rear view of the same.

Fig,3 is a transverse section on line x a: in`

' ing spring-bolt and a sliding thumb-piece for operating the bolt, and a device for locking the same, in combination with a handle that forms the case for containing the working p`arts.-

vIn the drawing, A is a handle, having an oblong opening for receiving the hand, and

.having the base-piece A1 for attaching it to the door.

The back of the base-piece is recessed to receive the sliding bolt B,which is kept in place by plates a b. A spring, o, bears against the end of the bolt, and projects it from the handle.

A bar, d, extends through the handle, at

4 right angles to the base-piece, and through an aperture, e, in the bolt B, and is provided -at its outer end with a thumb-piece, C. The bar d is attened on a diametrical line where it passes through the aperture in the bolt B, so that kturning the bar in either direction withdraws the bolt. -The bar el is also tapered back from the flattened portion, forming a wedge or inclined surface, that withdrawsthe bolt when the bar d is pushed through the bolt'.

The reversible form of latch 4shown in Fig.

4 consists of a base-piece, A3, which is symmetrical in form, and is recessed to receive the bolt B', having a central rectangular openin g, e', through which the bar d passes, which also projects through the front of the handle, and is provided with a thumb-piece, C. A triangular lug or wedge is formed on one side of the bar d', which engages the bolt B at the side of the rectangular opening, when the said bar is pushed in. The edges of the bar d are notched to receive the end of a bolt, f,

that is placed in a chamber formedin the handle D. In this locking-bolt there is an aperture, g, for receiving the key that moves it, and a key-hole, h, is made in the handle. A spring, It', presses against the side of the bolt f, and prevents it from being moved except by the key.

' The bolt B is notched in each edge at its center, to receive the end ofthe spring c', which projects the bolt from the handle after it has been withdrawn by pressing the thumb-piece C. The fixed end of the spring c is widened, and in it an arc-shaped slot, fi, is made, through which the screw passes which holds the end of the spring.- The recess that contains the spring is contracted to form a bearing, over which the spring binds. t

The sliding bolt is kept in place by a plate secured to the back of the base-piece by screws. When it is desired to reverse the bolt, the plate 'is removed, the bar d is removed and turned half around, and thebolt B is turned end for end, and the spring is shifted by loosening the binding-screw in the slot z'. In either case the inner end of the bar d or d is elongated, and is either provided with a knob, or is drilled transversely, to receive a temporary or permanent cross-bar or pin, for moving the bar from the inside of the door.

Instead of employing a sliding bolt for locking the bar d or d a hole, j, may be drilled 4through the bar and the handle, as shown in i Fig. 1, for receiving a padlock.

By attaching a catch-spring to the back of the base-piece, and employing the same sliding bar and thumb-piece, the device may `be.

adapted to sliding doors.

Having thus fully described my invention,I claim as new and desire to secure by Letters Patentv l. The combination of a sliding bolt, B, spring, and sliding bar d, with handle A, having a base-piece, substantially as shown and described.

e 19s,s11

2. The bolt B,havng rectangular aperture the spring k, the chambered handle D', and

e', and notches for receiving the end of the the notched bar d', in combination, substanspring, th?J sping g, hwing a lgvidened ang tial15r as shown and described.

slotted en ,an the ar in com inaton Wit handle D, having a base-piece, A3, recessed to THOMAS PERCIVAL' contain the spring and bolt7 substantially as Witnesses:

shown and described. J. DU Bois DECKER, 3. The bolt f, having the opening g and H. H. TERWTLLIGER. 

